BBC (Brown Boveri & Cie ?) became ABB in the late 1980's through a merger.
Try Contacting ABB or Satin American . They should be able to help you with cross-reference data on a newer product that is the same or similar to the relay you have.
Hope this helps you.
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Courage is not the absence of fear, but the inner resolve to rise above it....or the inane lapse in judgement brought on by copious imbibitions....Egre Flagrus